[SOLVED] Question(s) about the Color buffer


Hi everyone,

as I said in the title, I have some questions about the color buffer (VertexBuffer.Type.Color), which I can use to set a color per vertex.

This would be extremely useful, as I need to have a Mesh with a gradient in it. I can apply it to a vertex using this:

for (int i = 0; i < length; i++) {
    colorBuf[i] = color.mult((length-i)/length);

And in an update I set it like this:

this.setBuffer(VertexBuffer.Type.Color, 4, BufferUtils.createFloatBuffer(colorBuf));

I want to ask what this exactly does. Is this data send to the shader? If so, does Unshaded use it? If not, can I use it in my own? How?
Does it work on lines( setMode(Mode.Lines) )?
Because it doesn’t work for me.

Making a one-class test case is hard in this case, but I can post more relevant snippets.

Lol, I don’t think I have ever sold a problem of my own so fast.
forgot this:

mat.setBoolean("VertexColor", true);

Now I also see how to use this in a custom shader :slight_smile: .

1 Like

I know its solved, but for future reference anyone with similar issues… make sure you have




bookmarked. It doesn’t look like they would have helped in this particular case, but overall for shader development, they are a must know, or at least know about, you WILL need to reference them at some point later =)

I would just append [SOLVED] in front of the topic title and remove that IGNORE title as I did exactly the opposide :wink:

Thanks for the links.
It would be great if all the in-wiki links worked too…

Done :chimpanzee_amused: